Please help I will fail if I don’t get this right

In the diagram below what is the approximate length of the minor arc ab

What is the nth term rule of the linear sequence below? 27 , 25 , 23 , 21 , 19 , . .

Question 3 of 30 paul buys fruit to make smoothies. he buys 3.78 pounds of apples, 2.12 pounds of peaches, and 4.45 pounds of oranges. paul rounds each weight to the nearest tenth of a pound. about how many pounds of fruit did paul buy? (a) 10.5 pounds (b) 10.2 pounds (c) 10.4 pounds (d) 10.0 pounds 30 points